US PATENT SUBCLASS 208 / 321
.~.~ With solvent rehabilitation

Current as of: June, 1999
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208 /   HD   MINERAL OILS: PROCESSES AND PRODUCTS

308  DF  FRACTIONATION {5}
311  DF  .~ Liquid extraction with solvents {11}
321.~.~ With solvent rehabilitation

DEFINITION

Classification: 208/321

(under subclass 311) Processes combined with a particular treatment to remove or recover the solvent from a phase of

the extraction.

(1) Note. The mere recitation of the step of recovering the solvent by name only is not sufficient for classification in this subclass.

(2) Note. This subclass provides for the specific separation of the mineral oil from the solvent, inferentially, solvent is also recovered.